Which of the following is true about demand and quantity demanded? (SK of BC)(3 pointa)

a.Both a change in quantity demanded and a change in demand are caused by a change in a factor other than the current price.

b.A change in quantity demanded is caused by a change in current price while a change in demand is caused by a change in some other factor

c.A change in demand is caused by a change in current price while a change in quantity demanded is caused by a change in some other factor.

d.Both a change in quantity demanded and a change in demand are caused by a change in the current price

e.None of the above.